base/mkinitrd/mkinitrd.sh

   1 #!/bin/sh
   2 # --- SDE-COPYRIGHT-NOTE-BEGIN ---
   3 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
   4 #
   5 # Filename: package/.../mkinitrd/mkinitrd.sh
   6 # Copyright (C) 2006 - 2008 The OpenSDE Project
   7 # Copyright (C) 2005 - 2006 The T2 SDE Project
   8 #
   9 # More information can be found in the files COPYING and README.
  10 #
  11 # This program is free software; you can redistribute it and/or modify
  12 # it under the terms of the GNU General Public License as published by
  13 # the Free Software Foundation; version 2 of the License. A copy of the
  14 # GNU General Public License can be found in the file COPYING.
  15 # --- SDE-COPYRIGHT-NOTE-END ---
  16
  17
  18 set -e
  19
  20 if [ $UID != 0 ]; then
  21         echo "Non root - exiting ..."
  22         exit 1
  23 fi
  24
  25 while [ "$1" ]; do
  26   case $1 in
  27         [0-9]*) kernelver="$1" ;;
  28         -R) root="$2" ; shift ;;
  29         *) echo "Usage: mkinitrd [ -R root ] [ kernelver ]"
  30            exit 1 ;;
  31   esac
  32   shift
  33 done
  34
  35 [ "$root" ] || root=
  36 [ "$kernelver" ] || kernelver=`uname -r`
  37 [ "$moddir" ] || moddir="${root}/lib/modules/$kernelver"
  38
  39 echo "Kernel: $kernelver, module dir: $moddir"
  40
  41 if [ ! -d $moddir ]; then
  42         echo "Module dir $moddir does not exist!"
  43         exit 2
  44 fi
  45
  46 sysmap=
  47 [ -f "${root}/boot/System.map_$kernelver" ] && sysmap="${root}/boot/System.map_$kernelver"
  48
  49 if [ -z "$sysmap" ]; then
  50         echo "System.map_$kernelver not found!"
  51         exit 2
  52 fi
  53
  54 echo "System.map: $sysmap"
  55
  56 # check needed tools
  57 for x in cpio gzip ; do
  58         if ! which $x >/dev/null ; then
  59                 echo "$x not found!"
  60                 exit 2
  61         fi
  62 done
  63
  64 tmpdir=`mktemp`
  65
  66 # create basic structure
  67 #
  68 rm -rf $tmpdir >/dev/null
  69
  70 echo "Create dirtree ..."
  71
  72 mkdir -p $tmpdir/{dev,bin,sbin,proc,sys,lib/modules,lib/udev,etc/hotplug.d/default}
  73 mknod $tmpdir/dev/console c 5 1
  74
  75 # copy the basic / rootfs kernel modules
  76 #
  77 echo "Copying kernel modules ..."
  78
  79 if [ -x /sbin/modinfo -a -x /sbin/depmod ]; then
  80   find $moddir/kernel -type f | grep \
  81         -e reiserfs -e reiser4 -e ext2 -e ext3 -e /jfs -e /xfs \
  82         -e isofs -e udf -e /unionfs -e ntfs -e fat -e dm-mod -e md-mod \
  83         -e /ide/ -e /ata/ -e /scsi/ -e /message/ -e hci \
  84         -e usb-storage -e sbp2 -e /md/raid \
  85         -e drivers/net/ -e '/ipv6\.' |
  86   while read fn ; do
  87         for x in $fn `/sbin/modinfo $fn | grep depends |
  88                  cut -d : -f 2- | sed -e 's/ //g' -e 's/,/ /g' `
  89         do
  90                 # expand to full name if it was a depend
  91                 [ $x = ${x##*/} ] &&
  92                 x=`find $moddir/kernel -name "$x.*o"`
  93
  94                 echo -n "${x##*/} "
  95
  96                 # strip $root prefix
  97                 xt=${x##$root}
  98
  99                 mkdir -p `dirname $tmpdir/$xt`
 100                 cp $x $tmpdir/$xt 2>/dev/null
 101         done
 102   done | fold -s ; echo
 103
 104 # generate map files
 105 #
 106 /sbin/depmod -ae -b $tmpdir -F $sysmap $kernelver
 107
 108 else
 109   echo "ERROR: modinfo or depmod are missing in your installation."
 110   exit 1
 111 fi
 112
 113
 114 echo "Injecting programs and configuration ..."
 115
 116 # copying config
 117 #
 118
 119 # group (needed by udev to resolve group names)
 120 cp -a ${root}/etc/group $tmpdir/etc/
 121 # udev
 122 cp -ar ${root}/etc/udev $tmpdir/etc/
 123 # in theory all, but fat and currently only cdrom_id is needed ...
 124 cp -ar ${root}/lib/udev/* $tmpdir/lib/udev/
 125
 126 # setup programs
 127 #
 128 for x in ${root}/sbin/{udevd,udevtrigger,udevsettle,modprobe,insmod} ${root}/usr/sbin/disktype
 129 do
 130         # sanity check
 131         file $x | grep -q "dynamically linked" &&
 132                 echo "Warning: $x is dynamically linked!"
 133         cp $x $tmpdir/sbin/
 134 done
 135
 136 x=${root}/sbin/insmod.old
 137 if [ ! -e $x ]; then
 138         echo "Warning: Skipped optional file $x!"
 139 else
 140         file $x | grep -q "dynamically linked" &&
 141                 echo "Warning: $x is dynamically linked!"
 142         cp $x $tmpdir/sbin/
 143         ln -s insmod.old $tmpdir/sbin/modprobe.old
 144 fi
 145
 146 ln -s /sbin/udev $tmpdir/etc/hotplug.d/default/10-udev.hotplug
 147 cp ${root}/bin/pdksh $tmpdir/bin/sh
 148
 149 # static, tiny embutils and friends
 150 #
 151 for x in mount umount rm mv cp mkdir ln ls switch_root sleep losetup chmod cat sed mknod
 152 do
 153         if [ -x $root/usr/embutils/$x ]; then
 154                 x=$root/usr/embutils/$x
 155         elif [ -x $root/usr/bin/$x ]; then
 156                 x=$root/usr/bin/$x
 157         elif [ -x $root/bin/$x ]; then
 158                 x=$root/bin/$x
 159         else
 160                 echo "Error: $x was not found!" 1>&2
 161                 false
 162         fi
 163         # sanity check
 164         file $x | grep -q "dynamically linked" &&
 165                 echo "Warning: $x is dynamically linked!"
 166         cp $x $tmpdir/bin/
 167 done
 168
 169 cp ${root}/sbin/initrdinit $tmpdir/init
 170
 171 # create the cpio image
 172 #
 173 echo "Archiving ..."
 174 ( cd $tmpdir
 175   find * | cpio -o -H newc | gzip -c9 > ${root}/boot/initrd-$kernelver.img
 176 )
 177
 178 # display the resulting image
 179 #
 180 du -sh ${root}/boot/initrd-$kernelver.img
 181 rm -rf $tmpdir
 182
 183